Arrange timestamps

Before this items on timeline had a many gaps between themselves (17 rows total):
![image](https://f.cloud.github.com/assets/812240/1723921/a626ef42-6264-11e3-91fd-26268c3c39f0.png)

After that, timestamps arranged more closely (16 rows total):

![image](https://f.cloud.github.com/assets/812240/1723931/d798082c-6264-11e3-9362-a64a9325f078.png)